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<td ><a href="../qtdoc/index.html">Qt 5.12</a></td><td ><a href="qtquick-index.html">Qt Quick 模块</a></td><td ><a href="qtquick-qmlmodule.html">QML类型</a></td><td >GraphicsInfo QML 类型</td></tr></table><table class="buildversion"><tr>
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<li class="level1"><a href="#properties">属性</a></li>
<li class="level1"><a href="#details">详细信息</a></li>
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<h1 class="title">GraphicsInfo QML 类型</h1>
<span class="subtitle"></span>
<!-- $$$GraphicsInfo-brief -->
<p>Provides information about the used Qt Quick backend. <a href="#details">更多...</a></p>
<!-- @@@GraphicsInfo -->
<div class="table"><table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> 导入语句：</td><td class="memItemRight bottomAlign"> import QtQuick 2.12</td></tr><tr><td class="memItemLeft rightAlign topAlign"> Since:</td><td class="memItemRight bottomAlign">  QtQuick 2.8</td></tr></table></div><ul>
<li><a href="qml-qtquick-graphicsinfo-members.html">所有成员的列表，包括继承成员</a></li>
</ul>
<a name="properties"></a>
<h2 id="properties">属性</h2>
<ul>
<li class="fn"><b><b><a href="qml-qtquick-graphicsinfo.html#api-prop">api</a></b></b> : enumeration</li>
<li class="fn"><b><b><a href="qml-qtquick-graphicsinfo.html#majorVersion-prop">majorVersion</a></b></b> : int</li>
<li class="fn"><b><b><a href="qml-qtquick-graphicsinfo.html#minorVersion-prop">minorVersion</a></b></b> : int</li>
<li class="fn"><b><b><a href="qml-qtquick-graphicsinfo.html#profile-prop">profile</a></b></b> : enumeration</li>
<li class="fn"><b><b><a href="qml-qtquick-graphicsinfo.html#renderableType-prop">renderableType</a></b></b> : enumeration</li>
<li class="fn"><b><b><a href="qml-qtquick-graphicsinfo.html#shaderCompilationType-prop">shaderCompilationType</a></b></b> : enumeration</li>
<li class="fn"><b><b><a href="qml-qtquick-graphicsinfo.html#shaderSourceType-prop">shaderSourceType</a></b></b> : enumeration</li>
<li class="fn"><b><b><a href="qml-qtquick-graphicsinfo.html#shaderType-prop">shaderType</a></b></b> : enumeration</li>
</ul>
<!-- $$$GraphicsInfo-description -->
<a name="details"></a>
<h2 id="details">详细信息</h2>
<p>The <a href="qml-qtquick-graphicsinfo.html">GraphicsInfo</a> attached type provides information about the scenegraph backend used to render the contents of the associated window.</p>
<p>If the item to which the properties are attached is not currently associated with any window, the properties are set to default values. When the associated window changes, the properties will update.</p>
<!-- @@@GraphicsInfo -->
<h2>属性文档</h2>
<!-- $$$api -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="api-prop">
<td class="tblQmlPropNode"><p>
<a name="api-prop"></a><span class="name">api</span> : <span class="type"><a href="../qtqml/qml-enumeration.html">enumeration</a></span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property describes the graphics API that is currently in use.</p>
<p>The possible values are:</p>
<ul>
<li><a href="qml-qtquick-graphicsinfo.html">GraphicsInfo</a>.Unknown - the default value when no active scenegraph is associated with the item</li>
<li><a href="qml-qtquick-graphicsinfo.html">GraphicsInfo</a>.Software - Qt Quick's software renderer based on <a href="../qtgui/qpainter.html">QPainter</a> with the raster paint engine</li>
<li><a href="qml-qtquick-graphicsinfo.html">GraphicsInfo</a>.OpenGL - OpenGL or OpenGL ES</li>
<li><a href="qml-qtquick-graphicsinfo.html">GraphicsInfo</a>.Direct3D12 - Direct3D 12</li>
</ul>
</div></div><!-- @@@api -->
<br/>
<!-- $$$majorVersion -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="majorVersion-prop">
<td class="tblQmlPropNode"><p>
<a name="majorVersion-prop"></a><span class="name">majorVersion</span> : <span class="type"><a href="../qtqml/qml-int.html">int</a></span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property holds the major version of the graphics API in use.</p>
<p>With OpenGL the default version is <code>2.0</code>.</p>
<p><b>请参考 </b><a href="qml-qtquick-graphicsinfo.html#minorVersion-prop">minorVersion</a> 和 <a href="qml-qtquick-graphicsinfo.html#profile-prop">profile</a>。</p>
</div></div><!-- @@@majorVersion -->
<br/>
<!-- $$$minorVersion -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="minorVersion-prop">
<td class="tblQmlPropNode"><p>
<a name="minorVersion-prop"></a><span class="name">minorVersion</span> : <span class="type"><a href="../qtqml/qml-int.html">int</a></span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property holds the minor version of the graphics API in use.</p>
<p>With OpenGL the default version is <code>2.0</code>.</p>
<p><b>请参考 </b><a href="qml-qtquick-graphicsinfo.html#majorVersion-prop">majorVersion</a> 和 <a href="qml-qtquick-graphicsinfo.html#profile-prop">profile</a>。</p>
</div></div><!-- @@@minorVersion -->
<br/>
<!-- $$$profile -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="profile-prop">
<td class="tblQmlPropNode"><p>
<a name="profile-prop"></a><span class="name">profile</span> : <span class="type"><a href="../qtqml/qml-enumeration.html">enumeration</a></span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property holds the configured OpenGL context profile.</p>
<p>The possible values are:</p>
<ul>
<li><a href="qml-qtquick-graphicsinfo.html">GraphicsInfo</a>.OpenGLNoProfile (default) - OpenGL version is lower than 3.2 or OpenGL is not in use.</li>
<li><a href="qml-qtquick-graphicsinfo.html">GraphicsInfo</a>.OpenGLCoreProfile - Functionality deprecated in OpenGL version 3.0 is not available.</li>
<li><a href="qml-qtquick-graphicsinfo.html">GraphicsInfo</a>.OpenGLCompatibilityProfile - Functionality from earlier OpenGL versions is available.</li>
</ul>
<p>Reusable QML components will typically use this property in bindings in order to choose between core and non core profile compatible shader sources.</p>
<p><b>请参考</b> <a href="qml-qtquick-graphicsinfo.html#majorVersion-prop">majorVersion</a>，<a href="qml-qtquick-graphicsinfo.html#minorVersion-prop">minorVersion</a> 和 <a href="../qtgui/qsurfaceformat.html">QSurfaceFormat</a>。</p>
</div></div><!-- @@@profile -->
<br/>
<!-- $$$renderableType -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="renderableType-prop">
<td class="tblQmlPropNode"><p>
<a name="renderableType-prop"></a><span class="name">renderableType</span> : <span class="type"><a href="../qtqml/qml-enumeration.html">enumeration</a></span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property holds the renderable type. The value has no meaning for APIs other than OpenGL.</p>
<p>The possible values are:</p>
<ul>
<li><a href="qml-qtquick-graphicsinfo.html">GraphicsInfo</a>.SurfaceFormatUnspecified (default) - Unspecified rendering method</li>
<li><a href="qml-qtquick-graphicsinfo.html">GraphicsInfo</a>.SurfaceFormatOpenGL - Desktop OpenGL or other graphics API</li>
<li><a href="qml-qtquick-graphicsinfo.html">GraphicsInfo</a>.SurfaceFormatOpenGLES - OpenGL ES</li>
</ul>
<p><b>请参考 </b><a href="../qtgui/qsurfaceformat.html">QSurfaceFormat</a>。</p>
</div></div><!-- @@@renderableType -->
<br/>
<!-- $$$shaderCompilationType -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="shaderCompilationType-prop">
<td class="tblQmlPropNode"><p>
<a name="shaderCompilationType-prop"></a><span class="name">shaderCompilationType</span> : <span class="type"><a href="../qtqml/qml-enumeration.html">enumeration</a></span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property contains a bitmask of the shader compilation approaches supported by the Qt Quick backend the application is using.</p>
<ul>
<li><a href="qml-qtquick-graphicsinfo.html">GraphicsInfo</a>.RuntimeCompilation</li>
<li><a href="qml-qtquick-graphicsinfo.html">GraphicsInfo</a>.OfflineCompilation</li>
</ul>
<p>With OpenGL the value is <a href="qml-qtquick-graphicsinfo.html">GraphicsInfo</a>.RuntimeCompilation, which corresponds to the traditional way of using <a href="qml-qtquick-shadereffect.html">ShaderEffect</a>. Non-OpenGL backends are expected to focus more on <a href="qml-qtquick-graphicsinfo.html">GraphicsInfo</a>.OfflineCompilation, however.</p>
<p><b>Note: </b>The value is only up-to-date once the item is associated with a window. Bindings relying on the value have to keep this in mind since the value may change from <code>0</code> to the actual bitmask after component initialization is complete. This is particularly relevant for <a href="qml-qtquick-shadereffect.html">ShaderEffect</a> items inside <a href="qml-qtquick-shadereffectsource.html">ShaderEffectSource</a> items set as property values.</p><p>This property was introduced in  QtQuick 2.8.</p>
<p><b>请参考 </b><a href="qml-qtquick-graphicsinfo.html#shaderType-prop">shaderType</a> 和 <a href="qml-qtquick-graphicsinfo.html#shaderSourceType-prop">shaderSourceType</a>。</p>
</div></div><!-- @@@shaderCompilationType -->
<br/>
<!-- $$$shaderSourceType -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="shaderSourceType-prop">
<td class="tblQmlPropNode"><p>
<a name="shaderSourceType-prop"></a><span class="name">shaderSourceType</span> : <span class="type"><a href="../qtqml/qml-enumeration.html">enumeration</a></span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property contains a bitmask of the supported ways of providing shader sources.</p>
<ul>
<li><a href="qml-qtquick-graphicsinfo.html">GraphicsInfo</a>.ShaderSourceString</li>
<li><a href="qml-qtquick-graphicsinfo.html">GraphicsInfo</a>.ShaderSourceFile</li>
<li><a href="qml-qtquick-graphicsinfo.html">GraphicsInfo</a>.ShaderByteCode</li>
</ul>
<p>With OpenGL the value is <a href="qml-qtquick-graphicsinfo.html">GraphicsInfo</a>.ShaderSourceString, which corresponds to the traditional way of inlining GLSL source code into QML. Other, non-OpenGL Qt Quick backends may however decide not to support inlined shader sources, or even shader sources at all. In this case shaders are expected to be pre-compiled into formats like SPIR-V or D3D shader bytecode.</p>
<p><b>Note: </b>The value is only up-to-date once the item is associated with a window. Bindings relying on the value have to keep this in mind since the value may change from <code>0</code> to the actual bitmask after component initialization is complete. This is particularly relevant for <a href="qml-qtquick-shadereffect.html">ShaderEffect</a> items inside <a href="qml-qtquick-shadereffectsource.html">ShaderEffectSource</a> items set as property values.</p><p>This property was introduced in  QtQuick 2.8.</p>
<p><b>请参考 </b><a href="qml-qtquick-graphicsinfo.html#shaderType-prop">shaderType</a> 和 <a href="qml-qtquick-graphicsinfo.html#shaderCompilationType-prop">shaderCompilationType</a>。</p>
</div></div><!-- @@@shaderSourceType -->
<br/>
<!-- $$$shaderType -->
<div class="qmlitem"><div class="qmlproto">
<div class="table"><table class="qmlname">
<tr valign="top" class="odd" id="shaderType-prop">
<td class="tblQmlPropNode"><p>
<a name="shaderType-prop"></a><span class="name">shaderType</span> : <span class="type"><a href="../qtqml/qml-enumeration.html">enumeration</a></span></p></td></tr>
</table></div>
</div><div class="qmldoc"><p>This property contains the shading language supported by the Qt Quick backend the application is using.</p>
<ul>
<li><a href="qml-qtquick-graphicsinfo.html">GraphicsInfo</a>.UnknownShadingLanguage - Not yet known due to no window and scenegraph associated</li>
<li><a href="qml-qtquick-graphicsinfo.html">GraphicsInfo</a>.GLSL - GLSL or GLSL ES</li>
<li><a href="qml-qtquick-graphicsinfo.html">GraphicsInfo</a>.HLSL - HLSL</li>
</ul>
<p><b>Note: </b>The value is only up-to-date once the item is associated with a window. Bindings relying on the value have to keep this in mind since the value may change from <a href="qml-qtquick-graphicsinfo.html">GraphicsInfo</a>.UnknownShadingLanguage to the actual value after component initialization is complete. This is particularly relevant for <a href="qml-qtquick-shadereffect.html">ShaderEffect</a> items inside <a href="qml-qtquick-shadereffectsource.html">ShaderEffectSource</a> items set as property values.</p><p>This property was introduced in  QtQuick 2.8.</p>
<p><b>请参考 </b><a href="qml-qtquick-graphicsinfo.html#shaderCompilationType-prop">shaderCompilationType</a> 和 <a href="qml-qtquick-graphicsinfo.html#shaderSourceType-prop">shaderSourceType</a>。</p>
</div></div><!-- @@@shaderType -->
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